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Chapter 1. Introduction to 3Com VCX IP Telecommuting Module
When the Telecommuting Module is configured, the firewall connected to it must also be reconfigured (for the
DMZ and DMZ/LAN Telecommuting Module Types).
• Allow UDP and TCP traffic in the port interval used for media streams by the Telecommuting Module, and port
5060. This traffic must be allowed to all networks which should be reached by SIP traffic.
See also chapter 14, Firewall and Client Configuration, for information on configuring the firewall and the SIP
clients, and chapter 4, How To Configure SIP, for Telecommuting Module configuration examples.
Before you start
You could do a rough sketch of your network to make the configuration simpler. Things to think of:
• Which IP addresses will the Telecommuting Module interfaces use? You can have more than one IP network on
one interface, each requiring a separate IP address for the Telecommuting Module.
• Which series of IP addresses will be used on the networks connected to the different interfaces?
• Are there networks behind routers?
• What is the default gateway for the Telecommuting Module?
About settings in 3Com VCX IP Telecommuting Module
3Com VCX IP Telecommuting Module uses two sets of Telecommuting Module configurations: preliminary and
permanent configuration. The permanent configuration is what is used in the active Telecommuting Module. The
preliminary configuration is where you change and set the configuration. See chapter 3, Configuring 3Com VCX IP
Telecommuting Module, for instructions.
The changes you make in the preliminary configuration are not stored in the permanent configuration until you click
on Apply configuration on the Save/Load Configuration page under Administration.
The password configuration and time setting are the exceptions to this rule; they are saved immediately. Change the
administrator passwords and create more administrator users on the User Administration page under
Administration.
3Com VCX IP Telecommuting Module displays serious errors in red, e.g., if mandatory information is not entered.
Blank fields are shown in red. Fields that you correct remain red until you select Save, Add new rows or update the
page in some other way.
If you have a web connection with the Telecommuting Module that is inactive for 10 minutes, it will ask for a
password again.
Always log out from the Telecommuting Module administration interface when you are not using it. Press the Log
out button on the left to log out.
The terms used in the book are explained in appendix D, Definitions of Terms.
For a general description of how to configure and administer the Telecommuting Module, see
chapter 3,
Configuring 3Com VCX IP Telecommuting Module.
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